Li2NH is known to undergo a second-order transition from a disordered anti-fluorite high temperature phase to a 2x2x2 superstructure low-temperature phase. The low-T structure is still subject of discussion from both an experimental and theoretical viewpoint. Presently there is a growing consensus based around a new LT structure (partially occupied, space group Fd-3m)which agrees with diffraction data and molecular dynamics simulations implementing Li/H quantum effects by means of a colored-noise quantum thermostat. Molecular dynamics simulations assess that, around 400K, the Li sub-lattice undergoes a transition from a solid to a quasi-liquid phase, where the Li ions are seen principally to oscillate around their respective lattice sites, having enough mobility to diffuse. NCS measurements across the phase transition can clarify these aspects in a unique way complementing ND/NMR/QENS.